This issue should be tested in all desktop OS.
Install and open the app. Check that the developer tools aren't opened.
With the app focused, click "Control + Shift + I" (in MacOs is Command + Option + I). Check that the DevTools are opened.
Click somewhere inside the app so the focus is in the app and not in the DevTools.
Click "Control + Shift + I" (in MacOs is Command + Option + I). Check that the DevTools are closed.
Check that there is no option to open the DevTools in the app menu.